Light emitting device package and light unit having the same

ABSTRACT

A light emitting device package including a package body including a recess which is provided with a bottom face and a plurality of inner walls surrounding the bottom face, the plurality of inner walls including a first inner wall and a second inner wall, which are opposing walls; a lead frame including a first portion disposed on the bottom face of the package body and at least one second portion extending from the first portion, the first portion including a planar upper surface exposed at the bottom face and a planar lowermost surface positioned opposite to the planar upper surface; a light emitting element provided on the planar upper surface of the first portion; and a transparent material provided in the recess of the package body to cover the light emitting element. The at least one second portion includes an upper surface exposed at the first inner walls and a lower surface opposite to the upper surface; the lower surface of the at least one second portion includes a lower curved surface; the planar lowermost surface of the first portion is positioned lower than the lower curved surface of the at least one second portion; a stepped portion is positioned between the lower curved surface of the at least one second portion and the lowermost surface of the first portion; and the stepped portion contacts the package body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of co-pending application Ser. No.14/983,294, filed on Dec. 29, 2015, which is a Continuation ofapplication Ser. No. 14/638,398 filed on Mar. 4, 2015, now U.S. patentSer. No. 12/292,015, issued Feb. 2, 2016, which is a Continuation ofco-pending application Ser. No. 14/509,321 filed on Oct. 8, 2014, nowU.S. Pat. No. 8,994,038, issued Mar. 31, 2015, which is a Continuationof co-pending application Ser. No. 14/169,581 filed on Jan. 31, 2014,now U.S. Pat. No. 8,890,176, issued Nov. 18, 2014, which is aContinuation of Ser. No. 13/975,029 filed on Aug. 23, 2013, now U.S.Pat. No. 8,692,262, issued Apr. 8, 2014, which is a Continuation ofapplication Ser. No. 13/662,508 filed on Oct. 28, 2012, now U.S. Pat.No. 8,536,586, issued Sep. 17, 2013, which is a Continuation ofapplication Ser. No. 13/341,680 filed on Dec. 30, 2011, now U.S. Pat.No. 8,299,474, issued Oct. 30, 2012, which is a Continuation ofapplication Ser. No. 13/115,028 filed on May 24, 2011, now U.S. Pat. No.8,101,956, issued Jan. 24, 2012, which is a Continuation of applicationSer. No. 12/947,645 filed on Nov. 16, 2010, now U.S. Pat. No. 8,022,415,issued Sep. 20, 2011, which is a Continuation application Ser. No.12/530,637 filed on Sep. 10, 2009, now U.S. Pat. No. 7,858,993, issuedDec. 28, 2010, which is the national phase of PCT InternationalApplication No. PCT/KR2008/002183 filed on Apr. 17, 2008, and whichclaims priority to Application No. 10-2007-0038279 filed in the Republicof Korea on Apr. 19, 2007. The entire contents of all of the aboveapplications are hereby incorporated by reference.

TECHNICAL FIELD

The embodiment relates to an LED (light emitting device) package and alight unit having the same.

BACKGROUND ART

An LED constitutes a light emission source by using GaAs, AlGaAs, GaN,InGaN and InGaAlP-based compound semiconductor materials, therebyproducing various colors.

Such characteristics of the LED can be determined by materials, colors,brightness and a brightness range of a compound semiconductor. Further,the LED is provided as a package and is applied to various fieldscomprising lighting indicators for displaying colors, characterindicators, image indicators and the like.

DISCLOSURE OF INVENTION Technical Problem

The embodiment provides an LED package, in which a lead frame bent in amulti-step is disposed at a bottom surface and at least one sidewalldefining a cavity, and a light unit having the same.

The embodiment provides an LED package, in which at least one of plurallead frames is formed at a bottom surface and both sidewalls defining acavity, and a light unit having the same.

The embodiment provides an LED package comprising a lead frame, whichhas sidewalls inclined at a predetermined angle or bent with apredetermined curvature, and a light unit having the same.

Technical Solution

An embodiment provides an LED package comprising; a package body; afirst frame and a second frame on the package body; a light emittingdevice chip on the first frame; wherein the first frame is separatedfrom the second frame, and wherein the first frame comprises a bottomframe on the package body and at least two sidewall frames extendingfrom the bottom frame and inclined with respect to the bottom frame.

An embodiment provides an LED package comprising; a package body; asemiconductor light emitting device on the package body; and at leastone of frames comprising a bottom frame on the package body, and atleast two sidewall frames extending from the bottom frame and inclinedwith respect to the bottom frame.

An embodiment provides an LED package comprising; a body comprising acavity at one side thereof; at least one of lead frames comprising abottom frame and a sidewall frame in the cavity; and a light emittingdevice electrically connected with the lead frames.

An embodiment provides an LED package comprising; a body comprising acavity; a first lead frame comprising a bottom frame and at least onesidewall frame at a first side of the cavity; a second lead framecomprising a bottom frame at a second side of the cavity; and a lightemitting device electrically connected with the first and second leadframes.

An embodiment provides a light unit comprising; a light emittingapparatus comprising a plurality of LED packages; an optical guide platedisposed at one side of the light emitting device; and an optical memberdisposed above and/or below the optical guide plate, wherein the LEDpackage comprises a body comprising a cavity; at least one of leadframes comprising bottom frame and a sidewall frame in the cavity; and alight emitting device electrically connected with the lead frames.

ADVANTAGEOUS EFFECTS

The embodiment can reduce optical loss in a cavity of an LED package.

The embodiment can improve the light intensity at a center area in acavity of an LED package.

The embodiment can increase the amount of reflected light in a cavity ofan LED package by using a lead frame plated with reflective metal orreflective material.

The embodiment can improve thermal resistance and thermalcharacteristics of a lead frame of an LED package.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view showing an LED package according to anembodiment;

FIG. 2 is a sectional view taken along an X axis of an LED package shownin FIG. 1;

FIG. 3 is a perspective view showing the lead frame of FIG. 1 p FIG. 4is a sectional view taken along a Y axis of the LED package shown inFIG. 1;

FIG. 5 is a sectional view showing an LED package having a lead framemodified according to a first example embodiment;

FIG. 6 is a sectional view showing an LED package having a lead framemodified according to a second example embodiment;

FIGS. 7 to 10 are views showing lead frames modified according to thirdto sixth example embodiments;

FIG. 11 is a graph showing an angle of a lead frame as a function oflight intensity before and after the plating in the LED package of FIG.4;

FIG. 12 is a graph showing an angle of a lead frame as a function oflight velocity (or light amount) before and after the plating in the LEDpackage of FIG. 4; and

FIG. 13 is a perspective view showing a display device using the LEDpackage of FIG. 1.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an LED package according to an embodiment will be describedwith reference to the accompanying drawings.

FIG. 1 is a front view showing an LED package according to a firstembodiment, FIG. 2 is a sectional view taken along an X axis of the LEDpackage shown in FIG. 1, and FIG. 3 is a perspective view showing thelead frame of FIG. 1.

Referring to FIGS. 1 and 2, the LED package 100 comprises a polygonalshape, such as a rectangular parallelepiped shape or a regularhexahedral shape, and is classified into a side emission type LEDpackage and a top emission type LED package. Further, the LED package100 can be used as a light source for a backlight unit of an LCD or as alight unit in an illumination field. Hereinafter, a side emission typeLED package will be described for convenience of description.

The LED package comprises a body 110 comprising a cavity 120, leadframes 130 and 140, and a light emitting device 150.

The body 110 comprises one selected from the group consisting of PPA(polyphthalamid), PA9T (polyamid9T), liquid crystal polymer and SPS(syndiotactic polystyrene).

The body 110 is formed therein with the cavity 120 comprising apredetermined depth. When a first direction is referred to as an X axisand a second direction is referred to as a Y axis, the length of thebody 110 in the X axis direction may be greater than the width of thebody 110 in the Y axis direction. However, the scope of the presentinvention is not limited thereto.

The lead frames 130 and 140 are formed at the upper portion of the body110 through injection molding. A part of the lead frames 130 and 140 isexposed to the cavity 120 of the body 110.

Referring to FIGS. 1 to 3, the lead frames 130 and 140 comprises bottomframes 131 and 141 and sidewall frames 132 and 142 in the cavity 120,respectively. One end of the bottom frame 131 and one end of the bottomframe 141 may serve as external electrodes 133 and 143 by passingthrough the body 110 in the X axis direction, respectively. The sidewallframes 132 and 142 are inclined outward from the Y axis, which isperpendicular to the bottom frames 131 and 141, at a predeterminedangle. The external electrodes 133 and 143 can be provided by one of thebottom frames 131 and 141 and the sidewall frames 132 and 142.

The lead frames 130 and 140 are formed through injection molding usinghigh reflective metals comprising one selected from the group consistingof Fe, Sn, Cr, Zn, Ni, Al, Ag, Au, Cu, and an alloy thereof.

One of the lead frames 130 and 140, for instance, the lead frame 130 mayhave a substantially “C” shape in which three sides are bent at apredetermined angle, and the other one of the lead frames 130 and 140,for instance, the lead frame 140 may form the bottom frame 141. Further,at least one of the lead frames 130 and 140, for instance, the leadframe 130 can comprise the bottom frame 131 and at least one of thesidewall frames 132. According to the embodiment, the lead frames 130and 140 may have shapes different from each other. However, the scope ofthe present invention is not limited thereto.

The lead frames 130 and 140 are integrally formed in the cavity 120 andmay have lengths different from each other. Further, the lead frames 130and 140 can be formed with a thickness of 20 μm to 300 μm.

A partition 125 serving as a part of the body 110 is formed between thelead frames 130 and 140 to structurally separate the lead frame 130 fromthe lead frame 140. Thus, the lead frames 130 and 140 serve aselectrodes and reflect light.

Both sides (i.e. left and right sides 121 and 122) defining the cavity120 in the X direction are inclined at a predetermined angle and serveas a part of the body 110. The partition 125 and the left and rightsides 121 and 122, which are disposed in the cavity 120, can be formedtogether with the cavity 120 when the body 110 is formed.

The light emitting device 150 is attached to at least one of the leadframes 130 and 140 in the cavity 120, and is connected with the leadframes 130 and 140 through a wire 152. The light emitting device 150 canbe mounted on the lead frames 130 and 140 through wire bonding, flipbonding, die bonding and the like.

Further, the light emitting device 150 is a III-V group compoundsemiconductor and comprises one of AlGaN, GaN, InGaAlP and GaAs-basedLED chips. Further, a protective device such as a Zener diode can bemounted on the lead frames 130 and 140 in order to protect the lightemitting device 150.

Meanwhile, the LED package 100 can be prepared in the form of a whitelight emitting device using a blue LED chip and a yellow fluorescentsubstance (e.g. silicate-based fluorescent substance), orangefluorescent substance, green fluorescent substance, and red fluorescentsubstance. Further, the LED package 100 can be prepared in the form of alight source by combining at least one of a red LED chip, a green LEDchip, a blue LED chip, a yellow LED chip, a yellow green LED chip and anUV LED chip.

In addition, a resin member (not shown) can be molded in the cavity 120in order to protect the light emitting device 150. The resin member canuse epoxy or silicon having transparent material. If the situationrequires, fluorescent substance powder can also be added to the resinmember and molded in the cavity 120. Molding solution or additive can beused with the resin member according to the use purpose and environment,and the characteristics of a product. However, the embodiment is notlimited thereto. Further, the surface of the resin member has one of aflat shape, a concave lens shape and a convex lens shape.

FIG. 4 is a sectional view taken along a Y axis of the LED package shownin FIG. 1. Hereinafter, the lead frame 130 of the lead frames 130 and140 will be described as an example. However, it should be noted thatthe lead frames may not be formed under the same conditions as will bedescribed later.

Referring to FIG. 4, the body 110 has a predetermined height H1, e.g.maximum 1 mm. For instance, the sidewall frames 132 of the lead frame130 has an internal angle θ1 of 30° Further, the sidewall frames 132 canbe inclined at the same angle (e.g. 15°) or at different angles withrespect to the axis perpendicular to the bottom frame 131 of the leadframe 130.

The interval D1 between the sidewall frames 132 may vary according tothe internal angle θ1 between the sidewall frames 132 of the lead frame130. For instance, the bottom frame 131 of the lead frame 130 has awidth W1 of 300 μm to 310 μm.

FIG. 5 is a sectional view showing the LED package comprising a leadframe modified according to a first example embodiment. In describingthe above first example embodiment about the lead frame, the samereference numerals are used to designate the same elements of FIG. 4,and a detailed description will be omitted in order to avoid redundancy.

Referring FIG. 5, the height H2 of the body 110 and the width W2 of thebottom frame 131 may be identical to or different from those of FIG. 4,respectively. For instance, an internal angle θ2 between the sidewallframes 132 of a lead frame 130A is 45° Each sidewall frame 132 can beinclined at an angle of 22.5° with respect to the axis perpendicular tothe bottom frame 131. As the internal angle θ2 between the sidewallframes 132 of the lead frame 130A is increased, an interval D2 (D2>D1)between the sidewall frames 132 can be further widened. The interval D2between the sidewall frames 132 is widened, so that the surface width ofthe cavity 120 can be increased.

FIG. 6 is a sectional view showing the LED package comprising a leadframe modified according to a second example embodiment. In describingthe second example embodiment about the lead frame, the same referencenumerals are used to designate the same elements of FIG. 4, and adetailed description will be omitted in order to avoid redundancy.

Referring to FIG. 6, the height H1 of the body 110 and the width W3 ofthe bottom frame 131 may be identical to or different from those of FIG.4, respectively. For instance, an internal angle θ3 between the sidewallframes 132 of a lead frame 130B is 60°. Each sidewall frame 132 can beinclined at an angle of 30° with respect to the axis perpendicular tothe bottom frame 131. As the internal angle θ3 between the sidewallframes 132 of the lead frame 130B is increased, an interval D3(D3>D2>D1) between the sidewall frames 132 can be further widened.

FIGS. 7 to 10 are views showing lead frames modified according to thirdto sixth example embodiments.

Referring to FIG. 7, the lead frame 130C comprises the bottom frame 131and sidewall frames 132 bent from the bottom frame 131 at a right angle.In such a case, a width W4 of the bottom frame 131 and an interval D4between the sidewall frames 132 are 420 μm, and a cavity depth H4 of thelead frame 130C is 300 μm to 450 μm.

Referring to FIG. 8, the lead frame 130D comprises the bottom frame 131and one sidewall frame 132 inclined at an angle θ4 of 15° with respectto the axis perpendicular to the bottom frame 131. In such a case, acavity depth H5 of the lead frame 130D is 338 μm to 386 μm and aninterval D5 between the sidewall frames 132 is 600 μm to 626 μm. Forinstance, a width W5 of the bottom frame 131 is 420 μm.

Referring FIG. 9, the lead frame 130E comprises the bottom frame 131 andone sidewall frame 132 inclined at an angle θ5 of 30° with respect tothe axis perpendicular to the bottom frame 131. In such a case, a cavitydepth H6 of the lead frame 130E is 303 μm to 346 μm and an interval D6between the sidewall frames 132 is 770 μm to 850 μm. A width W6 of thebottom frame 131 is about 420 μm to 450 μm. A stepped portion is formedbetween the planar lower surface of the bottom frame 131 and the lowersurface of the reflector 132.

Referring to FIG. 10, the lead frame 130F comprises the bottom frame 131and sidewall frames 132A inclined at a predetermined angle with respectto the axis perpendicular to the bottom frame 131 while being bent witha predetermined curvature. In detail, the sidewall frames 132A areinclined at the predetermined angle and have a hemispherical shape toefficiently reflect light. A stepped portion is formed between theplanar lower surface of the bottom frame 131 and the lower surface ofthe reflector 132A.

According to the lead frames as described above, when one sidewall frame132 has an inclination angle of 15° to 30° with respect to the bottomframe, the cavity depth is 250 μm to 700 μm, and the interval betweenthe sidewall frames 600 μm to 850 μm, the highest efficiency isobtained. Further, the lead frame, which has high reflective metal or isplated with high reflective metal material, has a reflectivity of 95% ormore, and has improved thermal resistance and thermal characteristics.Further, the inclined sidewall frame can improve the light intensity atthe center area.

FIG. 11 is a graph showing an angle of the lead frame as a function oflight intensity before and after the plating in the LED package of FIG.4, and FIG. 12 is a graph showing an angle of the lead frame as afunction of light velocity (or light amount) before and after theplating in the LED package of FIG. 4. The box plot shown in FIGS. 11 and12 is obtained using a blue LED having a specification of the same lightintensity and the same light velocity. Further, the intensity of lightand the velocity of light are measured using the same measurementspecimen.

Referring to FIGS. 11 and 12, in the LED package of FIG. 4, theintensities of light of first to fifth LED packages #1 to #5 aremeasured by changing the internal angle θ1 of the lead frame. The first,second, third and fifth LED packages #1, #2, #3 and #5 comprise a leadframe, which is subject to Ag-plating after the bending and punchingprocesses (see A). The fourth LED package #4 comprises a lead frame,which is subject to Ag-plating before the bending and punching processes(see B).

Further, the internal angles of the lead frames of the first to fifthLED packages #1 to #5 are 0°, 30°, 45°, 55°, and 55°, respectively.

FIG. 11 is a graph showing the angle of the lead frame as a function ofthe light intensity of the LED package, and Table 1 below shows theresult.

TABLE 1 Lv (mcd) #1 #2 #3 #4 #5 AVG 138.9 197.0 202.2 166.5 216.3 MIN114.0 177.9 168.1 143.4 190.8 MAX 154.1 215.4 221.5 183.1 243.6

As shown in FIG. 11 and Table 1, the difference of 1 cd (=1000 mcd) isgenerated according to the angle of the lead frame, after the plating A,and before the plating B. The second LED package #2 has an internalangle greater than that of the first LED package #1 by 30°, and has alight intensity increased by 41.8%. The third LED package #3 has aninternal angle greater than that of the second LED package #2 by 15°,and has a light intensity increased by 2.6%. Further, the fifth LEDpackage #5 has an internal angle greater than that of the third LEDpackage #3 by 10°, and has a light intensity increased by 7.0%.

FIG. 12 is a graph showing the angle of the lead frame as a function ofthe lumen of the LED package, and Table 2 below shows the result.

TABLE 2 Lm #1 #2 #3 #4 #5 AVG 0.389 0.482 0.495 0.431 0.503 MIN 0.3600.410 0.440 0.400 0.460 MAX 0.420 0.510 0.520 0.460 0.540

As shown in FIG. 12 and Table 2, the difference of lumen is generatedaccording to the angle of the lead frame, after the plating A, andbefore the plating B. The second, third and fifth LED packages have alight velocity increased by 24%, 26.7% (=24%+2.7%) and 28.2%(=24%+2.7%+1.5%) when the internal angle of the lead frame is increasedby 30°, 45°, and 55°, respectively.

Referring to FIGS. 11 and 12, the fourth LED package #4 has thepre-plated lead frame and the fifth LED package #5 has the post-platedlead frame. At this time, the fourth and fifth LED packages #4 and #5have the same internal angles. However, since the lead frame of thefourth LED package #4 is subject to Ag-plating before the bending andpunching processes, the Ag plating surface is damaged when bending thelead frame. Thus, the optical efficiency deteriorates.

Accordingly, the LED package shows the optimal light intensity when thelead frame has an internal angle of 30° to 55°. Further, the postplating scheme exhibits optical efficiency higher than the pre-platingscheme. Furthermore, the surface of the lead frame is plated with highreflective metal or high reflective material, so that the lead frame hasa reflectivity of 95% or more, and improved thermal resistance andthermal characteristics. In addition, the light intensity at the centerarea can be improved by the inclined sidewall frames.

Such a LED package can be applied to an indication field, a displayfield and the like, and can be provided to a terminal together with adisplay device.

FIG. 13 is a perspective view showing a display device using the LEDpackage according to the embodiment.

Referring to FIG. 13, the display device 200 comprises a light emittingapparatus 104 comprising a plurality of LED packages 100, a reflectiveplate 201, a light guide plate 203, an optical sheet 205 and a displaypanel 207.

The light emitting apparatus 104 comprises the LED packages 100 mountedon a substrate 102. As shown in FIGS. 1 to 3, in the LED package 100, aplurality of lead frames have a structure in which the bottom frames areintegrally formed with the sidewall frames thereof while the sidewallframes are being bent from the bottom frames, or can be prepared in theform of the aforementioned example embodiments.

Such a light emitting apparatus 104 corresponds to at least one side ofthe light guide plate 203, and light emitted from the light emittingapparatus 104 is incident into a lateral side of the light guide plate203.

The light guide plate 203 guides the incident light over the whole areaof the display device 200 and then outputs the light as surface light.Further, a reflective pattern (not shown) can be formed at one side ofthe light guide plate 203.

The reflective plate 201 is disposed below the light guide plate 203 toreflect light leaked through the light guide plate 203.

The light emitted from the light guide plate 203 is irradiated onto thedisplay panel 207 through the optical sheet 205. The optical sheet 205comprises at least one of a diffusion sheet (not shown), a horizontalprism sheet (not shown) and a vertical prism sheet (not shown). Thediffusion sheet is disposed on the light guide plate 203 to diffuse theincident light. The horizontal and vertical prism sheets are disposed onthe diffusion sheet to guide the diffused light toward a display area.

The light emitting apparatus 104, the light guide plate 203 and theoptical sheet 205 can be defined as a light unit. The light unit maycomprise the reflective plate 201. Further, a part of the elements ofthe light unit can be received in a structure (not shown) such as a moldframe, a chassis structure or a metal bottom cover.

The display panel 207 serving as a liquid crystal panel comprises twotransparent substrates (not shown) and a liquid crystal, and can displayinformation by transmitted light and driving of the liquid crystal. Theembodiment is not limited to such a display panel 207. Further, adisplay panel can be disposed at both sides of the light guide plate203.

Such a display device 200 can be applied to a portable terminal such asa cell phone or a PMP, or a computer.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure.

INDUSTRIAL APPLICABILITY

The embodiment can reduce optical loss in a cavity of an LED package.

The embodiment can improve the light intensity at a center area in acavity of an LED package.

The embodiment can increase the amount of reflected light in a cavity ofan LED package by using a lead frame plated with reflective metal orreflective material.

The embodiment can improve thermal resistance and thermalcharacteristics of a lead frame of an LED package.

What is claimed is:
 1. A light emitting device package comprising: apackage body including a recess which is provided with a bottom face anda plurality of inner walls surrounding the bottom face, the plurality ofinner walls including a first inner wall and a second inner wall, whichare opposing walls; a lead frame including a first portion disposed onthe bottom face of the package body and at least one second portionextending from the first portion, the first portion including a planarupper surface exposed at the bottom face and a planar lowermost surfacepositioned opposite to the planar upper surface; a light emittingelement provided on the planar upper surface of the first portion; and atransparent material provided in the recess of the package body to coverthe light emitting element, wherein the at least one second portionincludes an upper surface exposed at the first inner walls and a lowersurface opposite to the upper surface, wherein the lower surface of theat least one second portion includes a lower curved surface, wherein theplanar lowermost surface of the first portion is positioned lower thanthe lower curved surface of the at least one second portion, wherein astepped portion is positioned between the lower curved surface of the atleast one second portion and the lowermost surface of the first portion,and wherein the stepped portion contacts the package body.
 2. The lightemitting device package according to claim 1, wherein the lead frameincludes a largest width between the lower surface of the at least onesecond portion and a furthermost surface of the lead frame from thelower surface of the at least one second portion in a width direction of600 micrometers to 850 micrometers.
 3. The light emitting device packageaccording to claim 1, wherein the lead frame includes a first anglebetween the first portion and the at least one second portion of105°˜120°.
 4. The light emitting device package according to claim 3,wherein the recess includes a second angle between the first inner walland the bottom face and a third angle between the second inner wall andthe bottom face, and wherein the second angle is different from thethird angle.
 5. The light emitting device package according to claim 4,wherein the second angle is greater than 105° and less than 120°.
 6. Thelight emitting device package according to claim 1, wherein an intervalangle between the at least one second portion of the lead frame and thesecond inner wall is greater than 30° and less than 60°.
 7. The lightemitting device package according to claim 1, wherein the lead frame hasa thickness of 20 micrometers to 300 micrometers.
 8. The light emittingdevice package according to claim 2, wherein an aspect ratio of the leadframe between the planar upper surface of the first portion and thelargest width between the lower surface of the at least one secondportion and the furthermost surface of the lead frame from the lowersurface of the at least one second portion in the width direction isless than 2.02.
 9. The light emitting device package according to claim9, wherein the aspect ratio of the lead frame between the planar uppersurface of the first portion and the largest width between the lowersurface of the at least one second portion and the furthermost surfaceof the lead frame from the lower surface of the at least one secondportion in the width direction is greater than 1.42.
 10. A lightemitting device package, comprising: a package body including a recesswhich is provided with a bottom face and a plurality of inner wallssurrounding the bottom face, the plurality of inner walls including afirst inner wall and a second inner wall, which are opposing walls; alead frame including a first portion disposed on the bottom face of thepackage body and at least one second portion extending from the firstportion, the first portion including a planar upper surface exposed atthe bottom face and a planar lowermost surface positioned opposite tothe planar upper surface; a light emitting element provided on theplanar upper surface of the first portion; and a transparent materialprovided in the recess of the package body to cover the light emittingelement, wherein the at least one second portion includes an uppersurface exposed at the first inner wall and a lower surface opposite tothe upper surface, wherein the lower surface of the at least one secondportion includes a lower curved surface, wherein the planar lowermostsurface of the first portion is positioned lower than the lower curvedsurface of the at least one second portion, wherein the stepped portionis positioned between the planar lowermost surface of the first portionand the lower curved surface of the at least one second portion, andwherein a thickness of the first portion of the lead frame is 20micrometers to 300 micrometers.
 11. The light emitting device packageaccording to claim 10, wherein a first angle between the at least onesecond portion of the lead frame and the first portion of the lead frameis greater than 105° and less than 120°.
 12. The light emitting devicepackage according to claim 11, wherein the recess includes a secondangle between the second inner wall and the bottom face, and wherein thefirst angle is different from the second angle.
 13. The light emittingdevice package according to claim 10, wherein an interval angle betweenthe at least one second portion of the lead frame and the second innerwall of the recess is greater than 30° and less than 60°.
 14. The lightemitting device package according to claim 10, wherein the recess has adepth of 250 micrometers to 700 micrometers.
 15. A light emitting devicepackage, comprising: a package body including a recess which is providedwith a bottom face and a plurality of inner walls surrounding the bottomface, the plurality of inner walls including a first inner wall and asecond inner wall, which are opposing walls; a lead frame including afirst portion disposed on the bottom face of the package body and asecond portion extending from the first portion, the first portionincluding a planar upper surface exposed at the bottom face and a planarlowermost surface positioned opposite to the planar upper surface; alight emitting element provided on the planar upper surface of the firstportion; and a transparent material provided in the recess of thepackage body to cover the light emitting element, wherein the secondportion includes an upper surface exposed at the first inner wall and alower surface opposite to the upper surface, wherein the lower surfaceof the second portion includes a lower curved surface, wherein theplanar lowermost surface of the first portion is positioned lower thanthe lower curved surface of the second portion, wherein a steppedportion contacting the package body is positioned between the planarlowermost surface of the first portion and the lower curved surface ofthe second portion, wherein the recess includes a first angle betweenthe first inner wall and the bottom face and a second angle between thesecond inner wall and the bottom face, wherein the lead frame includes athird angle between the planar upper surface of the first portion andthe second portion, and wherein the second angle is different from thethird angle.
 16. The light emitting device package according to claim15, wherein the lead frame includes a largest width between the lowersurface of the second portion and a furthermost surface of the leadframe from the lower surface of the second portion in a width directionof 600 micrometers to 850 micrometers.
 17. The light emitting devicepackage according to claim 16, wherein an aspect ratio of the lead framebetween the planar upper surface of the first portion and the largestwidth between the lower surface of the second portion and thefurthermost surface of the lead frame from the lower surface of thesecond portion in the width direction is less than 2.02.
 18. The lightemitting device package according to claim 17, wherein the aspect ratioof the lead frame between the planar upper surface of the first portionand the largest width between the lower surface of the second portionand the furthermost surface of the lead frame from the lower surface ofthe second portion in the width direction is greater than 1.42.
 19. Thelight emitting device package according to claim 15, wherein the leadframe includes a first angle between the first portion and the secondportion of 105°˜120°.
 20. The light emitting device package according toclaim 15, wherein an interval angle between the second portion of thelead frame and the second inner wall of the recess is greater than 30°and less than 60°.